Systems

 

 

Integrated electrical and low-voltage systems of all types—inside and outside a building—encompass the range of work that electrical contractors do. The articles in this section highlight different types of work, from security, fire and life safety, to traditional electrical power and distribution, to lighting, cabling and more. 

Electronic access control is one of the most proprietary technologies (beside fire alarms) with the largest installed base of legacy equipment in the physical security industry.

Since 1999, the National Fire Alarm and Signaling Code has required survivability for certain circuits that need to work during a fire. In truth, the code has always required speaker circuits serving emergency voice/alarm communications systems to meet a performance requirement for survivability. 


Figure 1: Special manual building evacuation station. Photo courtesy of Jensen Hughes Inc.

Recently, a number of inquiries were made to our office regarding the topic of delaying or preventing the activation of fire alarm notification appliances.

As the nation's energy mix evolves to comprise an expanding supply of green power, its distribution systems must also keep up with those changes. The U.S. Department of Energy (DOE) is supporting research toward that end to encourage greater modernization and resiliency on the grid.

More on Systems

 
Problems of Aging Fiber Optic Networks

Is it time to fine-tune older fiber? Some fiber optic networks have now been in use for more than 20 years, a tribute to the inherent capabilities of optical fiber.


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On Auctions, RFID and '4D'

The construction industry won a major battle in late July, when the U.S. Army Corps of Engineers (ACE) issued its verdict on reverse auctions. As hoped, the Corps sees no advantages to the idea.


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Wind Generation - Trends and Issues

In 1993, government researchers concluded that a group of 12 states in the midsection of the country have enough wind energy resources to generate nearly four times the amount of electricity consumed nationwide in 1990.


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Backups for Blackouts

Last year's blackout sparked a sharp rise in consumer interest in ensuring constant uptime, which has provided more and more opportunities for the electrical contractor. With this increased demand comes the consumer's desire for more cost-effective power.


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Voice Data Products Show Maturation

It's an extension of capabilities that rules Straight from the show floor at the recent American Society for Industry Security (ASIS) convention in Dallas is this revelation: new isn't the buzzword for voice/data/video, security and life safety products-a maturation or extension of current capabili


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Getting Friendly with C-STAR

Manufacturers, NECA, and IBEW work on certification Since C-STAR is set to make its debut soon, it is time to take another look at the comprehensive certification for low-voltage systems installers.


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Unified Messaging

E-mail, voice mail and faxes find you in the office or on the go Communications, at its core, propels business forward. If not for the daily barrage of phone calls, e-mail messages and faxes, business would probably come to a halt.


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